// Copyright 2012 Citrix Systems, Inc. Licensed under the
// Apache License, Version 2.0 (the "License"); you may not use this
// file except in compliance with the License.  Citrix Systems, Inc.
// reserves all rights not expressly granted by the License.
// You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// 
// Automatically generated by addcopyright.py at 04/03/2012
package com.cloud.storage.download;

import org.apache.log4j.Level;

import com.cloud.agent.api.storage.DownloadAnswer;
import com.cloud.agent.api.storage.DownloadProgressCommand.RequestType;
import com.cloud.storage.VMTemplateStorageResourceAssoc.Status;

public class DownloadErrorState extends DownloadInactiveState {

	public DownloadErrorState(DownloadListener dl) {
		super(dl);
	}


	@Override
	public String handleAnswer(DownloadAnswer answer) {
		switch (answer.getDownloadStatus()) {
		case DOWNLOAD_IN_PROGRESS:
			getDownloadListener().scheduleStatusCheck(RequestType.GET_STATUS);
			return Status.DOWNLOAD_IN_PROGRESS.toString();
		case DOWNLOADED:
			getDownloadListener().scheduleImmediateStatusCheck(RequestType.PURGE);
			getDownloadListener().cancelTimeoutTask();
			return Status.DOWNLOADED.toString();
		case NOT_DOWNLOADED:
			getDownloadListener().scheduleStatusCheck(RequestType.GET_STATUS);
			return Status.NOT_DOWNLOADED.toString();
		case DOWNLOAD_ERROR:
			getDownloadListener().cancelStatusTask();
			getDownloadListener().cancelTimeoutTask();
			return Status.DOWNLOAD_ERROR.toString();
		case UNKNOWN:
			getDownloadListener().cancelStatusTask();
			getDownloadListener().cancelTimeoutTask();
			return Status.DOWNLOAD_ERROR.toString();
		default:
			return null;
		}
	}



	@Override
	public String handleAbort() {
		return Status.ABANDONED.toString();
	}


	@Override
	public String getName() {
		return Status.DOWNLOAD_ERROR.toString();
	}


	@Override
	public void onEntry(String prevState, DownloadEvent event, Object evtObj) {
		super.onEntry(prevState, event, evtObj);
		if (event==DownloadEvent.DISCONNECT){
			getDownloadListener().logDisconnect();
			getDownloadListener().cancelStatusTask();
			getDownloadListener().cancelTimeoutTask();
			getDownloadListener().updateDatabase(Status.DOWNLOAD_ERROR, "Storage agent or storage VM disconnected");  
			getDownloadListener().log("Entering download error state because the storage host disconnected", Level.WARN);
		} else if (event==DownloadEvent.TIMEOUT_CHECK){
			getDownloadListener().updateDatabase(Status.DOWNLOAD_ERROR, "Timeout waiting for response from storage host");
			getDownloadListener().log("Entering download error state: timeout waiting for response from storage host", Level.WARN);
		}
		getDownloadListener().setDownloadInactive(Status.DOWNLOAD_ERROR);
	}


}